22545-17 245/40-18 Difference; Diameter inches (mm) 24.97 (634.3) 25.72 (653.2) 0.74 (18.9) 3%: Width inches (mm) 8.86 (225) 9.65 (245) 0.79 (20) 8.9%: Circum. inches 22545/18 vs 255/40/18 tires in the rear! The 245's definitely look better on the rears, from a purely cosmetic standpoint. But the tradeoff is extra unsprung weight, more rolling mass, more wind resistance, and higher replacement cost. TBH none of the negatives outweigh the purely cosmetic look to me, so I prefer to get 245 or wider on the Sizedifference between 245/50 R18 and 255/45 R18 tires. In the tire comparison table above, you can see a detailed calculation of the size difference between 245/50 R18 and 255/45 R18 tire. The calculation results are presented in the form of visual infographics, on which tire with size 245/50 R18 is on top, and tire with size 255/45 R18 below. Thedifference in sizes and parameters between the 275/40 R18 tire and 255/40 R18 tire. Detailed calculations and graphics. Calculate the difference in inches. Tire calculator online . Top comparisons; 225/45 R18: 245/40 R18: 245/45 R18: Thecalculation results are presented in the form of visual infographics, on which tire with size 225/55 R18 is on top, and tire with size 245/40 R18 below. Both in the table and in the graph, the tires are compared according to the following indicators: overall diameter, section width, circumference, sidewall height and clearance. Compare225/45 R18 vs 245/40 R18. So, the sidewall height of a 225/45 R 18 tire is 60% of 225 = 192. The 3rd number 18 (generally preceded by an "R") is Rim Diameter in inches. This is the diameter of the rims bead seat base, not the diameter of the outer rim edge. The rim edge, or lip, extends past the tire bead seat to hold the bead and LatestAvon ZZ5 Reviews. Given 71% Audi A4 B8 Sedan (245/40 R18) on for 8,000 average miles. The tyre was a solid all rounder, and for the price they are really a good choice. They handled as well as required for a 200bhp relatively light vehicle in the dry and the wet. They did sadly wear much quicker than hoped. Geta quote for 245/40/18 tyres online. Tyremart is the leading tyre and wheel supplier with over 100 tyre fitment centres nationwide. 245/40/R18 / Load 97 / Speed Y . 4x4 Offroad. Mileage. Dry Roads. Wet Roads. Low Noise. More Info. Add to Quote. Goodyear. Goodyear Eagle F1 Asymmetric 6. 22545 R18 95W: 660mm--225/55 R18 98V: 705mm--225/60 R18 100H: 727mm--235/40 R18 95W: 645mm--235/45 R18 98W: 669mm--235/50 R18 101W: 692mm--235/50 R18 97V: 692mm--235/65 R18 106W: 763mm--245/40 R18 97W: 653mm--245/45 R18 100W: 678mm--245/60 R18 105H: 751mm--255/45 R18 103W: 687mm--Looking for a Maxxis dealer? Thedifference in sizes and parameters between the 245/40 R18 tire and 235/35 R19 tire. Detailed calculations and graphics. Calculate the difference in inches. Tire calculator online . Top comparisons; 225/45 R17: 225/40 R18: 245/35 R19: 255/35 R19: 265/30 R19: KEgnv.